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Finding the Fourth Proportional to 40.69, 56.15 and 26.15

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Solution

The fourth proportional to 40.69, 56.15 and 26.15 is: 36.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.69 : 56.15 = 26.15 : x
  2. Step 2: Convert to fraction form
    40.69/56.15 = 26.15/x
  3. Step 3: Cross multiply
    40.69x = 56.15 × 26.15
  4. Step 4: Simplify right side
    40.69x = 1,468.11
  5. Step 5: Solve for x
    x = 1,468.11/40.69
  6. Step 6: Final answer
    x = 36.08

Related Problems

Find fourth proportional to 20.34, 28.08 and 13.07
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.